Abstract
This study focuses on the valorization of extraction residues of medicinal plants which represent approximately 80% of the gross weight of the plant. In this context we proceeded to the transformation of “marc oregano” to a material adsorbent type activated carbon. The oregano marc, obtained after extraction of essential oils and organic compounds, has undergone a chemical activation using the phosphoric acid 85% (H 3 PO 4 ). It is well known as precursors of lignocellulosic activating agent, allows the development of a large porosity in the activated material. The activated product has subsequently underwent heat treatment in the temperature range from 200 to 350 °C. The optimum temperature for development was set at 300 °C. The results obtained showed that the adsorbent material O 300 has developed the interesting textural properties. It is an adsorbent material like activated carbon, which presents, according to the BET method, a specific surface of 1200 m 2 ·g −1 (specific surface area of commercial activated carbon is of about 905 m 2 ·g −1 ). The application of adsorbent material developed O 300 in microbial decontamination of urban waste water, has revealed its effectiveness and its important adsorptive properties against pathogens pollutants from wastewater.
Highlights
Morocco has very significant potentials in the field of medicinal and aromatic plants (MAP)
This study focuses on the valorization of extraction residues of medicinal plants which represent approximately 80% of the gross weight of the plant
The extraction residues obtained from the MAP, which represent over 80% of the weight of the plant are not yet exploited
Summary
Morocco has very significant potentials in the field of medicinal and aromatic plants (MAP) It perfoms the important productions of the MAP and their derivatives, which gives it a significant place in the international market. Which requires a valorization of these residues by opening a new way of exploiting these natural resources, and the transformation of these residues at activated carbon and applying it in the environmental field It is within this context that fits the present work which has set its objectives itself: The valuation of oregano extract residues and its transformation into adsorbent material, and application of the material developed in the field of microbial decontamination of liquid effluents urban. It promotes the development of a three-dimensional structure with a high porosity and with a very high specific surface
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